Constructed from high impact ABS thermoplastic moulding lined with impact absorbing foam, giving good protection to the top and sides of the foot. Recommended to be used with AL1, ALK2 & 3.Available in two models, one to fit with the AL1 and ALK2, the other with the ALK2.Secured to the foot by webbing straps and velcro fastenings.Available in one size.Weight per pair 400 grams